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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

phone line status to pc project

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programmer

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Hi, I am designing a project to get the status of the phone line and convert it to 8bit and send it to the com1 port on the computer, I found the almost part of the circuits in the internet (on hook off hook circuit ) (Dtmf detector circuit ) sprately and i want to connect this tow circuits together ,

I use hm9720 ic witch comptible with 8870 to detect the DTMF
and for (on\off hook) you can found it **broken link removed**

Iam waiting for your help :D :?:
 
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